package com.gp.pj.interceptors;

import com.auth0.jwt.exceptions.AlgorithmMismatchException;
import com.auth0.jwt.exceptions.SignatureVerificationException;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.gp.pj.utils.JWTUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;

/**
 * @author 45709
 */
public class JWTInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Map<String,Object> map = new HashMap<>();
        String token = request.getHeader("token");
        try{
            JWTUtils.verifyToekn(token);
            return true;
        }catch(SignatureVerificationException e){
            e.printStackTrace();
            map.put("msg","无效的签名!");
        }catch (TokenExpiredException e){
            e.printStackTrace();
            map.put("msg","token已失效!");
        }catch(AlgorithmMismatchException e){
            e.printStackTrace();
            map.put("msg","token算法不一致!");
        }catch(Exception e){
            e.printStackTrace();
            map.put("msg","token无效!");
        }
        map.put("code",false);
        String json = new ObjectMapper().writeValueAsString(map);
        response.setContentType("application/json;charset=utf-8");
        response.getWriter().println(json);
        return false;
    }
}
